DC-DC Regulator. LMR12007 Datasheet

LMR12007 Regulator. Datasheet pdf. Equivalent

Part LMR12007
Description Step-Down DC-DC Regulator
Feature LMR12007 www.ti.com SNVS982 – SEPTEMBER 2013 LMR12007 Thin SOT23 750mA Load Step-Down DC-DC Regul.
Manufacture etcTI
Datasheet
Download LMR12007 Datasheet



LMR12007
LMR12007
www.ti.com
SNVS982 – SEPTEMBER 2013
LMR12007 Thin SOT23 750mA Load Step-Down DC-DC Regulator
Check for Samples: LMR12007
FEATURES
1
23 Thin SOT-6 Package
• 3.0V to 18V Input Voltage Range
• 1.25V to 16V Output Voltage Range
• 750mA Output Current
• 550kHz (LMR12007Y) and 1.6MHz (LMR12007X)
Switching Frequencies
• 350mNMOS Switch
• 30nA Shutdown Current
• 1.25V, 2% Internal Voltage Reference
• Internal Soft-Start
• Current-Mode, PWM Operation
• WEBENCH® Online Design Tool
• Thermal Shutdown
APPLICATIONS
• Local Point of Load Regulation
• Core Power in HDDs
• Set-Top Boxes
• Battery Powered Devices
• USB Powered Devices
• DSL Modems
• Notebook Computers
DESCRIPTION
The LMR12007 regulator is a monolithic, high
frequency, PWM step-down DC/DC converter in a 6-
pin Thin SOT package. It provides all the active
functions to provide local DC/DC conversion with fast
transient response and accurate regulation in the
smallest possible PCB area.
With a minimum of external components and online
design support through WEBENCH®, the LMR12007
is easy to use. The ability to drive 750mA loads with
an internal 350mNMOS switch using state-of-the-
art 0.5µm BiCMOS technology results in the best
power density available. The world class control
circuitry allows for on-times as low as 13ns, thus
supporting exceptionally high frequency conversion
over the entire 3V to 18V input operating range down
to the minimum output voltage of 1.25V. Switching
frequency is internally set to 550kHz (LMR12007Y) or
1.6MHz (LMR12007X), allowing the use of extremely
small surface mount inductors and chip capacitors.
Even though the operating frequencies are very high,
efficiencies up to 90% are easy to achieve. External
shutdown is included, featuring an ultra-low stand-by
current of 30nA. The LMR12007 utilizes current-mode
control and internal compensation to provide high-
performance regulation over a wide range of
operating conditions. Additional features include
internal soft-start circuitry to reduce inrush current,
pulse-by-pulse current limit, thermal shutdown, and
output over-voltage protection.
Typical Application Circuit
Efficiency vs Load Current "X"
VIN = 5V, VOUT = 3.3V
VIN
C1
ON
OFF
D2
VIN
BOOST
C3
SW
D1
EN
FB
GND
L1
VOUT
C2
R1
R2
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
WEBENCH is a registered trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated



LMR12007
LMR12007
SNVS982 – SEPTEMBER 2013
Connection Diagram
www.ti.com
BOOST 1
GND 2
FB 3
6 SW
5 VIN
4 EN
1
6
2
5
3
4
Figure 1. 6-Lead SOT
See Package Number DDC (R-PDSO-G6)
Figure 2. Pin 1 Indentification
PIN DESCRIPTIONS
Pin
Name
Function
1
BOOST Boost voltage that drives the internal NMOS control switch. A bootstrap capacitor is connected between the
BOOST and SW pins.
2
GND Signal and Power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin
for accurate regulation.
3
FB
Feedback pin. Connect FB to the external resistor divider to set output voltage.
4
EN
Enable control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN + 0.3V.
5
VIN
Input supply voltage. Connect a bypass capacitor to this pin.
6
SW Output switch. Connects to the inductor, catch diode, and bootstrap capacitor.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)
VIN
SW Voltage
Boost Voltage
Boost to SW Voltage
FB Voltage
EN Voltage
Junction Temperature
ESD Susceptibility(2)
Storage Temp. Range
Soldering Information
Infrared/Convection Reflow (15sec)
Wave Soldering Lead Temp. (10sec)
-0.5V to 22V
-0.5V to 22V
-0.5V to 28V
-0.5V to 6.0V
-0.5V to 3.0V
-0.5V to (VIN + 0.3V)
150°C
2kV
-65°C to 150°C
220°C
260°C
(1) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(2) Human body model, 1.5kin series with 100pF.
2
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Product Folder Links: LMR12007
Copyright © 2013, Texas Instruments Incorporated





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